Toyota ISO - scangauge issue

[bkg]

Have an issue with my 04 dcab that's driving me a bit nutty.

155K miles, CA emission-vehicle. Engine stock (deck plate mod, 2.5" exhaust that I built), timing belt/all tune ups in last 6 months, new rear O2 sensor <6 months ago).

Like my 04 xcab, it has a scangauge 2. As to be expected, when installed, the ABS light flashed quickly. So I had Scangauge send me an ISO-only dongle, as that solved the problem on my xcab.

It fixed the problem for a couple of months. But now it's back. SC2 plugged in, ABS light flashes. Not plugged in, no ABS light.

Plugged in and set to force ISO communications (more-more-force) on the gauge itself. Also doesn't work.

Oddly... I just picked up a p0420 code as well... So I'm guessing I need to start looking at a new cat.

What am I missing?? Any ideas?

 

[toyotech]

Don't know much about the scan gauge as I have a ultra gauge.

Why would the scan gauge cause the abs light to flash? I haven't heard of others having this issue

P0420 is the cat. I been lucky in the last with just replacing o2 sensors with denso units.


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[bkg]

Apparently, anything other than ISO confuses the abs computer. Pretty common. But that’s what is causing my confusion.

At 155k, it’s probably the cat....

 

[toyotech]

Apparently, anything other than ISO confuses the abs computer. Pretty common. But that’s what is causing my confusion.

At 155k, it’s probably the cat....

What is ISO? Seen a lot of Tacoma guys run scan gauge


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[bkg]

What is ISO? Seen a lot of Tacoma guys run scan gauge


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There are a few different protocols used by vehicle MFG's over the years. Most have solidified on CanBus (basically token-ring for the car... literally). Toyota used ISO for a while.

So the scangauge tries to cover all protocols.. and in some cases, the auto-detecting protocol "technology" will interfere with the ABS computer, causing the abs light to flash.

Hence why scangauge offers an ISO-only cable (essentially some pins removed. like a USB power-only cable, as an example)... And 99.999999% of the time, that solves the problem. Hence my confusion.

 

[toyotech]

There are a few different protocols used by vehicle MFG's over the years. Most have solidified on CanBus (basically token-ring for the car... literally). Toyota used ISO for a while.

So the scangauge tries to cover all protocols.. and in some cases, the auto-detecting protocol "technology" will interfere with the ABS computer, causing the abs light to flash.

Hence why scangauge offers an ISO-only cable (essentially some pins removed. like a USB power-only cable, as an example)... And 99.999999% of the time, that solves the problem. Hence my confusion.

Makes sense. Guessing the ISO cable is at additional cost ?


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[bkg]

Makes sense. Guessing the ISO cable is at additional cost ?


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every time I've seen this issue, scanguage has sent the ISO-only cable at no cost. I have 2, neighbor 1... just took a call. gotta give them credit for that.